package com.Filter;

import javax.servlet.*;
import javax.servlet.annotation.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter(filterName = "LoginFilter",urlPatterns = {"/index_admin.jsp","/index_user.jsp"})
public class LoginFilter implements Filter {
    public void init(FilterConfig config) throws ServletException {
    }

    public void destroy() {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws ServletException, IOException {
        HttpServletRequest request1 = (HttpServletRequest)request;
        HttpServletResponse response1 = (HttpServletResponse)response;
        HttpSession session = request1.getSession();
        System.out.println(session.getAttribute("username"));
        if(session.getAttribute("username")== null) {
            response1.sendRedirect("filter.jsp");
        }
        else {
            chain.doFilter(request, response);
        }
    }
}
